Im posting here to get some feed back about mirc's CRC check which is included in all versions after and including 6.11. I speak for the customization community which exists at <url deleted>
We have been using tools like resource hacker for years to customize mIRC's look by changing it's window and switchbar icons.
I understand you worry about others hacking mirc for malicious purposes, but the community would really like to be able to customize mIRC's icons!