merging existing .fig into the same figure

Hi,
I have two figures e.g. gugu.fig and lulu.fig )
i want to place tham one next to the other and create gugululu.fig plot where gugu is on the right and lulu is on the left.

can i call gugu and lulu from subplot? (wasn't able to do that).

I've been reading some suggestions in this site, dealing with figure properties, copyobj, etc'. for some reason it didn't work (

I'd appreciate an example for creating such a merge.
thanks,
ZiV