I just recreated the Syflex toolbar as a XPOP popup because I don't like toolbars so much xD. Needs (the old version of) XPOP installed. Command Name is rcPOPSyflex. I have it mapped to ALT+s, you can of course map in to any key you want.

Hope you find it useful, I think I added (or removed?) some usability by chosing more verbose command labels ("Add Collision Sphere" instead of "collide sph"), also you can directly inspect the Syflex op without going throught the hierarchy, and it has a link to the syflex documentation html file...
zipped .xsiaddon: