Instrument for pre-accession assistance (IPA II) (2014-2020) documents can be found here

Establishing an instrument for pre-accession assistance (IPA) (2007-2014)

Commission Regulation 718/2007

Practical Guide to Contract procedures for EU external action

Current version   PRAG 2014. Older versions can be found  here

Financial Regulations

Current version of  FINANCIAL REGULATIONS. Older versions can be found here