I dealt with something similar - was doing a triathlon and wanted the chamois padding for the bike but didn't want to do a long run with this diaper feeling. If you are like me, you have more clothes and shorts than absolutely necessary - so I unstiched a good chamois from a less favorable pair of bike shorts. I secured it in place with velcro into my running tights- so that when I was done with the bike and back in transition, I reached in, and pulled the chamois out. I used the velcro that applies with a sticky side versus sewing in the velcro. Worked like a charm.