When I download file in browser, I can choose various ISPs in Extended Download Settings (see attachet picture). I don't use Direct Download. Could be possible add this option in Rapidshare premium plugin options? Thanks.

I think it's not possible with current API.

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To use different ISP you just need to change subdomain in URL of downloaded file.
Example: file http://rapidshare.com/files/123456/fake.txt redirects to http://rs226tg.rapidshare.com/files/123456/dl/fake.txt. You will download file via Cogent (I think this is default RS provider). To download file via TeliaSonera #3 you need to change subdomain from rs226tg to rs226tl3. Is this really impossible? :)
URLs above are fakes ;)

it's impossible to support it in GUI.
Free RS plugin has the feature.

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