compatibility with the original sources.list repository list & checking for updated PPA's

Hello

I would like to ask if the Y-PPA Manager is compatible with the original sources.list or only with the recent sources.list.d method. I am still using the sources.list to save my repos. because I find this way more transparent.

I would like to have a function, which checks for updated PPA's. Everytime I install a new version of ubuntu I copy my sources.list and the keys and replace all version identifiers with the new version (e.g. karmic main -> lucid main). The problem is, that at the release-time of a new Ubuntu version lot of repositories still do not have branch/packages for the newest version of Ubuntu. So after I do - apt-get update - I get : repository not found error. So this tells me which repositorys was not updated yet and I set their identifiers to the further original version. But there is no option to do it autimaticaly - to check which PPA's are present for the recent Ubuntu version AND to change them.

Sorry for my bad english I hope you would understand.

Greetings K