Well Greeny that is something that i want and value and insofar as i know only irfanview does it this well as a GUI and this quickly; also i have always loved and respected Irfanview always was free and nifty
I think of it as a bona fide Linux application [ which happens to be on Windows]
If anyone else knows how to install full version of Irfanview under Wine please tell us
In the meantime started to fiddle with ImageMagick very nice application too Thank you Olle for bringing it to my attention
and this does the same as the Irfanview function
Works with most extensions too
montage 1.gif 2.gif 3.gif 4.gif \ -mode Concatenate -tile x1 montage_cat.jpg
Excellent. Problem solved.