Will still do it sometimes, regardless.
Yes, but very very rarely.
1. Search for "47 F8 55 00 CC 00 CC 00" (1 match)
2. Search forward for "E6 F4 FF DF", notice the address, save the last 4 bytes (0x69E0A -> 9E0A)
3. Change "47 F8 55 00 CC 00 CC 00" to "47 F8 55 00 EA 00 0A 9E" (use the last 4 bytes loHi)
In EEPROM change 69 C1, A5 to 8E 5A, D2. On page 01 and 02.
This approach works on pretty much everything. Technically if WinOLS is correcting checksums you can only do the EEPROM.
The first patch is to check checksum when ECU is powering up (IGNITION ON). The EEPROM mod is to disable checksums while ECU is running, which is the really important part.