Window treatment replacements?

[jornvango]

We still have the factory window treatments.  However, some of them have broken/are bent and we are looking to replace them.  When we bought our truck camper 8.6, the 4-season package wasn't available so we would like to replace the factory blinds with something warmer (fabric, to prevent the single pane windows from losing so much heat, or letting in the heat in the summer).

I noticed the blind are attached to the walls with these things that have multiple (bendable) pins that stick into the wall.  Once you take it off, how are you supposed to get these back on?!

Any recommendations on curtains to replace the blinds with (or is this a do-it-yourself kinda project) and also, how to attach them to the wall?

Thanks!