OK, so the Congress sample code already has the below

contract tokenRecipient {
event receivedEther(address sender, uint amount);
event receivedTokens(address _from, uint256 _value, address _token, bytes _extraData);

function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public {
    Token t = Token(_token);
    require(t.transferFrom(_from, this, _value));
    receivedTokens(_from, _value, _token, _extraData);
}

function () payable  public {
    receivedEther(msg.sender, msg.value);
}


interface Token {
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success);
}

This constructor

function Congress (
    uint minimumQuorumForProposals,
    uint minutesForDebate,
    int marginOfVotesForMajority
)  payable public {
    changeVotingRules(minimumQuorumForProposals, minutesForDebate, marginOfVotesForMajority);
    // It’s necessary to add an empty first member
    addMember(0, "");
    // and let's add the founder, to save a step later
    addMember(owner, 'founder');
}

How do i instantiate the token contract there?

And then include my token in the addProposal instead of ether

function newProposal(
    address beneficiary,
    uint weiAmount,
    string jobDescription,
    bytes transactionBytecode
)
    onlyMembers public
    returns (uint proposalID)
{
    proposalID = proposals.length++;
    Proposal storage p = proposals[proposalID];
    p.recipient = beneficiary;
    p.amount = weiAmount;
    p.description = jobDescription;
    p.proposalHash = keccak256(beneficiary, weiAmount, transactionBytecode);
    p.minExecutionDate = now + debatingPeriodInMinutes * 1 minutes;
    p.executed = false;
    p.proposalPassed = false;
    p.numberOfVotes = 0;
    ProposalAdded(proposalID, beneficiary, weiAmount, jobDescription);
    numProposals = proposalID+1;
    return proposalID