Hi well I want to study at UNM New Mexico and CNM New Mexico, but initially I only wanted to go to CNM but they don't issue I-20's is there any other kind if visa I can get to study there?
like an extended 6 month visa??? or anything like that 
There isn't any way around it - if they don't issue I-20s then that means that the US government hasn't approved them as a sponsor for student visas and so they cannot accept any international students. If CNM doesn't issue I-20s or DS-2019s then I'm afraid you're going to have to find somewhere else to study.
If you don't already live in the US on a different visa, there are only 2 ways you can study in the US:
- on an F-1 student visa (which you need an I-20 for)
- on a J-1 exchange visa (which you need a DS-2019 for) (this is for short-term exchanges, such as a pre-organised study-abroad year)
[I studied at UNM on a J-1 exchange visa (with a DS-2019) in 2003/04 and then later on an F-1 student visa (with an I-20) in 2008]
If CNM isn't an approved sponsor for issuing I-20s then it's unlikely they will be approved to issue DS-2019s either (you can check here:
http://j1visa.state.gov/participants/how-to-apply/sponsor-search/).
I'm not sure if you realise, but CNM is a community college, rather than a university (it's essentially the US equivalent of a Further Education College). Community colleges usually only offer 2-year associates degrees (equivalent to an HND or foundation degree in the UK) and so often students will do two years at a community college first and then go on to a university to complete a full 4-year bachelors degree.
It sounds like CNM does not cater for international students, so you're just going to have to give up on that idea, I'm afraid.
UNM issue I-20's and I was thinking of going there eventually but there has to be a way to study at a college that doesnt issue I-20's
Unfortunately not, if you try to study at a school without a valid I-20 (or a DS-2019), you will be breaking the law. You cannot get a student visa without one and you cannot study in the US without a student visa. You must have both a valid I-20 (or DS-2019) and an F-1 (or J-1) student visa in your passport in order to be let into the country and to register with the university (the university's international office will check and photocopy your documents when you arrive).
