InstantMask is a quick and simple to use freeware picture background removing program. The freeware version you are using has everything you need to cut out a picture from the background.
Open a picture you want to edit with Instant Mask, and then mark the areas of foreground and background, press preview to see you changes.
About InstantMask Portable
InstantMask.ThinstallSoft.7z | 5.0 MB
@ThinstallSoft.com | InstantMask Portable 1.4 Portable Download Page