I have all these references to the call for this message box:

References in RegDefra: to 00410994
Address Disassembly Comment
00410994 PUSH 1030 (Initial CPU selection)
00412D68 CALL RegDefra.00410994
00413C3E CALL RegDefra.00410994
00414569 CALL RegDefra.00410994
00415DD1 CALL RegDefra.00410994
0041680B CALL RegDefra.00410994
00416AD1 CALL RegDefra.00410994
00416FD0 CALL RegDefra.00410994
004176B6 CALL RegDefra.00410994
004176EA CALL RegDefra.00410994
004181C3 CALL RegDefra.00410994
00418A3B CALL RegDefra.00410994
00418C70 CALL RegDefra.00410994
00418CA6 CALL RegDefra.00410994
00418CDC CALL RegDefra.00410994
00418D0F CALL RegDefra.00410994
00418D42 CALL RegDefra.00410994

And a lot of the code where the calls are made look like this, with unconditional jumps above the call, but the one just above the call usually calls up 00410094 anyway, I've traced them earlier in trying to figure it out.

00418A34 . EB 0F JMP SHORT RegDefra.00418A45
00418A36 .^E9 11ABFEFF JMP RegDefra.0040354C
00418A3B . E8 547FFFFF CALL RegDefra.00410994
00418A40 . E8 E7ACFEFF CALL RegDefra.0040372C