You sure you have private keys and not addresses?

Address (note the begins with one and is generally shorter than a private key):
14CD3Ra5yMjWaEA3HTX5nAqvYb8sSjMheJ

Private Key (one format could be in an alternate form):
5KEWNTr5Jsk4H147KkNE2NZTg9zXESU5m6rmibfJQMvMswL6WiZ

If you have private key.
1) Don't share it with anyone.  Access to private key = ownership for all practical intents and purposes.  If you give someone the private key so they can help and they steal your coins they are probably gone.
2) As indicated above you can import the private key into any wallet, even a new QT client wallet, an eWallet, or a different client and gain access to the funds.

If you have the address not the private key then you have nothing. Addresses are public knowledge.  The private key is what allows the owner (and nobody else) to spend/move coins.