Thanks for your input Chemo, increasing the memory alloc in php.ini did indeed help, though as you imply, I think I may need to look a bit deeper at the structure of the store...hmmmm.
A most excellent contrib by the way, as for the install scripts & installation procedure/instructions, well.. lets just say "I like your style".
I'll be playing with minor hack on this tomorrow to preg_replace <br> to - as my descriptions often have breaks in them, I'll post when done, it may help others.
Cheers
john