Any way to add custom code activities to VS toolbox for any workflow project?

Question

What I would like to achieve is to have 2 tabs with custom code activities added automatically to the toolbox every time a new activity is created in any (workflow) project. Ideally this should be done through some code or installer.
I found a solution using the Visual Studio Integration Package but that one is not suitable for me (as it needs the SDK).

I have also tried using the IActivityToolboxService interface but that worked only for creating the tabs in the toolbox. And I was able to create them only if I (already) had access in toolbox to my custom activities.

Any other ideas are highly appreciated.

Lambdoid

I forgot to mention that I'm using VS2010. – Lambdoid

Are you referring to snippets or Components? – Liberal

I don't really get what is the problem. Could you clarify what are you trying to achieve please? – Weissberg

Did you ever find a solution to this? – Francis

Are you trying to say that you want to convert a string into code? – Indented

I found the answer to this and it solved my problems at that moment: blogs.msdn.microsoft.com/kushals/2010/03/11/… – Lambdoid