( SOLVED ) Ubuntu Software ???

[oxo42]

  I have just moved from LL 1.0.8 to LL 2.6 there are a few programes that I used with 1.0.8 / they are ie:-

1) Ubuntu Software Centre
2) Ubuntu Tweak
3) Lite Software Centre

I would very much like to install these programes / but it poses a few questions,

1) Is it safe to do so ?
2) If it's safe how do I get them ?

                                          Thanks.