Thanks.
I have just written a short tool to scan the .exe file for all the substitute offsets, here is the definitive list of values that can be edited via Olly (excluding hard-coded values).
Code:
//Subs named
401b2e - African Nations Cup
405708 - Argentinian Premier
407ee5 - Argentinian Second
40ab69 - Asia Club Championship
40cc69 - Asia Cup Winners Cup
40f53c - Asia Nations Cup
4106b9 - Asian Super Cup
411d70 - Australian NSL
41dd91 - Begian First
41f081 - Belgian Second
422794 - Belgian Third
4259f5 - Brazilian Champions Cup
427501 - Brazilian Cup *
427ed3 - Brazilian Cup *
42a625 - Brazilian First
42cbf9 - Brazilian Second
42ded5 - Brazilian Third
43107e - Brazilian Central State Championship
43234f - Brazilian Gaúcho State Championship
4336cf - Brazilian Goiás State Championship
43803f - Brazilian Paraná State Championship
4394af - Brazilian Pernambucco State Championship
43a67e - Brazilian Rio State Championship
43bcf2 - Brazilian Santa Catarina State Championship
51497a - Croatian A1
515e7c - Croatian A2A
516f9a - Croatian A2B
5174e9 - Croatian Cup
550a8c - Danish Cup *
5516d3 - Danish Cup *
552437 - Danish First
553a89 - Danish Premier
56aab5 - Englsih Auto Cup
56c317 - English Conference Cup
56d3e9 - English Charity Shield
56ee5a - English Conference
572e0d - English First (now Championship)
574c03 - English Premier
5767fe - English Second (now First)
578159 - English Third (now Second)
57a16e - European Super Cup
57b6b5 - European Championships
57e976 - European Champions League Qualifiers
58383f - European Champiosn League
58be1b - Fifa Confederations Cup
5922b9 - Finnish Cup
593c06 - Finnish First
595cfa - Finnish Premier
5bc489 - French First
5bf134 - French Second
5d8c89 - German Cup
5db489 - German First
5dc1aa - German League Cup
5dcba3 - German Regional
5df477 - German Second
5e1354 - Gold Cup
5e88f5 - Greek Cup
5eaf26 - Greek Premier
5ebe74 - Greek Second
5ec0a9 - Greek Super Cup
5f34ab - Dutch Cup
5f63d2 - Dutch First
5f85f2 - Dutch Premier
6320ed - Inter American Cup
63301e - Intertoto Cup
634109 - Irish Challenge Cup
635b1d - Irish First
636509 - Irish Leinster Cup
636e25 - Irish League Cup
638809 - Irish Munster Cup
63a98b - Irish Premier
63ad21 - Irish Super Cup
63c64d - Italian C1 Super
63cc95 - Italian Serie C Cup
63e955 - Italian Cup
6416d6 - Italian Serie A
646938 - Italian Serie B
64b803 - Italian Serie C1A
64f9ca - Italian Serie C1B
653c23 - Italian Serie C2A
6580e3 - Italian Serie C2B
65c271 - Italian Serie C2C
65f6dd - Italian Super Cup
661d99 - Japanese Emporer's Cup
6636bb - Japanese J1
6651cd - Japanese J2
6653e9 - Japanese J Cup
66bd46 - Korean League
66bf55 - Korean League Cup
66d885 - Korean Super Cup
78c7d5 - Northern Irish League Cup
78f089 - Norwegain Cup
790b7e - Norwegian First
79278c - Norwegian Premier
79970e - Oceania Nations Cup
7a02ae - Olympic Games
7c7de9 - Polish Cup
7c9716 - Polish First
7ca5bc - Polish League Cup *
7cb1b3 - Polish League Cup *
7cbfe4 - Polish Second
7cc985 - Polish Super
7cf9c0 - Portuguese Premier
7d1742 - Portuguese Second
7d268b - Portuguese Second B
7e9279 - Russian Cup
7ea89e - Russian First
7eb7da - Russian Premier
7ec9e9 - Scottish Challenge Cup
7ed379 - Scottish FA Cup
7eeee9 - Scottish First
7efa49 - Scottish League Cup
7f2a43 - Scottish Premier
7f4014 - Scottish Second
7f4f9c - Scottish Third
84cfb9 - Spanish Cup
84fe8f - Spanish First
853811 - Spanish Lower
855d66 - Spanish Second
856f74 - Spanish Second B
858719 - Spanish Super Cup
88cc1d - Swedish Cup
88f136 - Swedish First
8905dc - Swedish Premier
8bf3b1 - nothing
8fc419 - Turkish Cup
8fe020 - Turkish First
8ff312 - Turkish Second
9004df - Tukish Second B
90234e - Uefa Cup
90f292 - World Cup African League
911c61 - World Cup Asian League
919265 - World Cup European League
91ed6c - World Cup Oceania Group
9210fc - World Cup South American Group
925cd1 - Conference North / Welsh Premier
925ee5 - Welsh League Cup
927845 - Welsh Premier Cup
929c1c - World Club Championships
92b51e - World Club Cup
92d28c - World Cup
//Subs allowed
40ab6d - Asian Club Championship
40cc6d - Asian Cup Winners Cup
4106bd - Asian Super Cup
41d0be - Belgian FA Cup
41dd95 - Belgian First
41f085 - Belgian Second
4259f1 - Brazilian Champions Cup
427505 - Brazilian Cup
427ed7 - Brazilian Cup
5174ed - Croatian Cup
550a90 - Danish Cup
5516d7 - Danish Cup
56aab9 - English Auto Cup
56d3ed - English Charity Shield
5922bd - Finnish Cup
5d8c8d - German Cup
5dc1ae - German League Cup
5dcba7 - German Regional
5e88f1 - Greek Cup
5ec0ad - Greek Super Cup
5f34a7 - Dutch Cup
6320f1 - Inter American Cup
63410d - Irish Challenge Cup
63650d - Irish Leinster Cup
636e21 - Irish League Cup
63880d - Irish Munster Cup
63ad25 - Irish Super Cup
63c649 - Italian Serie C1 Super Cup
63cc91 - Italian Serie C Cup
63e951 - Italian Cup
6416da - Italian Serie A
64693c - Italian Serie B
65f6d9 - Italian Super Cup
661d9d - Japanese Emporer's Cup
6653ed - Japanese J Cup
66bf51 - Korean League Cup
66d889 - Korean Super Cup
78c7d1 - Northern Irish League Cup
78f08d - Norwegian Cup
7c7ded - Polish Cup
7c971a - Polish First
7ca5c0 - Polish League Cup *
7cb1b7 - Polish League Cup *
7cc989 - Polish Super Cup
7d268f - Portuguese Second B
7e927d - Russian Cup
7ec9ed - Scottish Challenge Cup
7ed37d - Scottish FA Cup
7efa4d - Scottish League Cup
84cfbd - Spanish Cup
85871d - Spanish Super Cup
88cc21 - Swedish Cup
8fc41d - Turkish Cup
90f296 - World Cup African Group
911c65 - World Cup Asian Group
914a72 - World Cup CONCACAF Group
925ee1 - Welsh League Cup
927841 - Welsh Premier Cup
Those marked with a * indicate they appear twice but I don't know why. Possibly because the competition has two stages which can be edited independently?