Hm, and what exactly do you miss in PSPad? I think that for your purpose replacing (_standard_) global regex ^\s*;.*$ with "nothing" will remove all commented lines (even if you leave spaces or tabs before ";"), and Edit > Lines.. > Remove blank lines helps getting rid of, erm, resulting blank lines.
If you are asking for multiline replacements, it is long standing request, which is not about to be fixed in near future (search forum). To me it seems you mix some FmPoW weird regex dialect from Ultra Edit with standard one. Look at http://www.ultraedit.com/support/tutorials_power_tips/ultraedit/regular_expressi ons.html for reference ("UNIX" there = PSPad in your case) -- <http://forum.pspad.com/read.php?2,58106,58107> PSPad freeware editor http://www.pspad.com
