//echo -a $crc(mirc.exe)
4A0890E0

//echo -a $md5(mirc.exe)
34ddba9a9e2ce80593e744ed88a60f2e

mIRC 6.03 on my (now win2k) machine. You could try those commands, see if they are the same.

============
Gotta love windows 2000 ;P

[03:44:00 pm] <Edward_K> (mIRC memory usage) mIRCs running:(3)
[03:44:02 pm] <Edward_K> (1) Used RAM:(64.26MB) Total Memory allocated:(61.39MB) Handles:(249) Threads:(10) USER Resources:(1043) GDI Resources:(150)
[03:44:02 pm] <Edward_K> (2) Used RAM:(36.78MB) Total Memory allocated:(36.64MB) Handles:(209) Threads:(5) USER Resources:(728) GDI Resources:(114)
[03:44:03 pm] <Edward_K> (3) Used RAM:(5.97MB) Total Memory allocated:(3.91MB) Handles:(181) Threads:(5) USER Resources:(8295) GDI Resources:(84)
[03:44:04 pm] <Edward_K> Total used ram:(107.01MB) Total Allocated:(101.94MB) Total handles:(2557) Total threads:(20) Total USER Resources:(10066) Total GDI Resources:(348)