Problem In SQL Developing As Restricted User (member Of User Group)

Greetings,VWD EE and other Tools do not have problems working O.K. on my machine, when I am logged-on as restricted(limited) user, both environment and local web server are functioning, and it was MS effort to do it right.BUT the Problem is, when I try to connect to database->new DB connection(either through vwd or management studio etc). I get an Error - which should be written to event log (according to msg) but it isn't - that I can't connect. I am sure that it is because NO SQL SERVER2005EXPRESS instance is running, which I think is the only prerequisite to have it work (I do not need sqlbrowser service I am doint local development).SQL2005express service is configured on MANUAL start. I can start it as administrator through SQL config manager, but it is not convienient and what I want. I need to start it ONLY as a developer user, I do not want it to be running all-the-time for everyuser using computer. It was congigured as Network Service logon, I tried Local Service logon, and I even tried configuring it to logon as -my developer user- account, e.g. with limited user name and his password.In every case I can't start the service as member of users group and this developer. Then I added limited user to SQL2005EXPRESS group. Still NO help, won't start either.My question is, If I want to start developing ADO2.NET application and I need to have running SQL2005Express instance as a develper, how can I start it? I think I do not have some rights to masterDB or something. Do it allways need to be running when computer starts? Isn't there any other way, to start it JUST when I think I start developing?I know of user-mode of accessing SQL2005express DBs, but it also assumes that SQL2005Express service is already running, what I am trying to prevent. I do not want to have it running for everyone who uses computer, just for someone who neeeds it.Any help explaining me the right way HOW TO SETUP WORKING ENVIRONMENT when developing as limited user welcome, I read the the documentations and haven't found the answers.THANK YOU !