Hi again

I'm not familiar with either of those but, having Googled, I would think that Photo Plus 8 would have a facility to adjust the RGB channels and probably levels and curves (the white-black adjusters) , in addition to desaturation/greyscale and contrast.
I don't see whether Photo Suite has these facilities.
An alternative freeware program that is very good is The Gimp:
http://www.gimp.org/This does have all the features that I've mentioned and is a good free competitor to Photoshop and Paint Shop Pro.
Irfanview is very good for downloading 'odd' formatted files and resizing, etc. but is very limited for photo editing.
Gadget