Contact Groups

I'm really stuggling with this phone, I use it for buisness and used to have my contacts set in groups so that I could send a text to 1 group of people, now I have to single out those people from just a long list of contacts, can anyone help me how to put them in groups or is there an app that can help me do this? also had an app on my old phone from ovi that allowed me to write a text and put a date and time on when i wanted it sent, I can't find any buisness apps now for the n900. does anyone know if the apps are being brought out in the near future or isn't there much intention of it. Someone help me out as I'm getting close to swapping the phone to the iphone as I can't make it meet my needs Shocked(

Mycontacts can group and show it in desktop, it can not send group sms as of now.