Unfortunately not. You can have your users install mIRC and use a seperate installer to load your script, though.

Originally Posted By: License Agreement
mIRC may only be distributed as part of the original mIRC install file as distributed by mIRC Co. Ltd. mIRC and the mIRC install file may not be distributed as a part of any package and may not be modified, decompiled, disassembled, or reverse engineered.

See also: Khaled's FAQ