NameCheap and Tumblr

I am a little irritated right now. I really wanted to try out Tumblr on my domain that is just sitting there but in order to do that I have to change my A-record. So I went to name cheap to change the A-Record so Tumblr would work correctly and I can't change the A-record unless I am on namecheap nameservers. Gur. I am not on namecheap nameservers because I get wonderful hosting elsewhere. Ah well. Guess I need to think of another project for my extra domain. It just irritates me that something so simple can be such a pain.