Replying...
1. Yes, it's possible. You don't have to configure anything really. SIGPro will create a separate directory for each user to upload their galleries.
2. Yes, images can be resized. But the limit is always on width. You see, we can scroll vertically, but it sucks doing that horizontally. If you want to enforce a height, you can still do so with some tweaks in SIGPro, which we can provide through our helpdesk system.
Fotis / JoomlaWorks Support Team
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