multiple guide sets

In another thread a poster asked about multiple guide sets:

http://forums.adobe.com/message/4062904#4062904

It would seem that this should be fairly simple to achieve with writing guides’ properties into the metadata (possibly a dedidcated layer’s xmpMetaData) in sets and subsequently loading them from there.

One could even do just one dialog with an entry field for entering a name when saving a guide set and a dropDownList to load or remove such sets.

So I wonder if anybody either has already done something like this or has a (better) idea on the issue?

Thanks for any feedback.