ABS headliner & sail panels

Getting ready to install front and rear glass and just want to make sure I'm not overlooking anything. The only interior pieces that I plan to install before the glass is the dash, headliner and sail panels. Is that all that has to be in? I have the abs style headliner and sail panels. Is there any trick to installing them? I know the dome light, mirro, visors and clips hold the headliner in but what about the sail panels? My new ones don't have the factory style clips. They came w/ 2 velco strips for each one. Is the velco good enough to hold them? Any tips for this whole process would be greatly appreciated.