STEVE Lomas says using the funds freed up by Dany N'Guessan's exit to extend Shaun Derry's loan and sign Martyn Waghorn is "the deal of the century."
N'Guessan, who had just under a year remaining on his contract at The Den, joined Swindon Town on a free transfer at the start of the month.
"I feel that to get Shaun Derry and Martyn Waghorn in for Dany N'Guessan's contract is the deal of the century, to be honest," Lomas said.
"That is proper wheeling and dealing for two high calibre players. The chairman and Andy Ambler told me to be creative, and between the three of us we have been.
"We all worked very hard to get these deals done for more or less the equivalent of Dany's contract, which is nothing short of miraculous. At one stage it looked like we'd have only one fit striker for Saturday, so the board, the chairman and Andy are to be commended."
Millwall have also completed the signing of free agent Paul Connolly on a four-month deal.
Lomas said: "We've got a player who has made over 300 appearances in the Championship, so he's very experienced. The drawback is that Paul has been without a club for a while but I believe, by bringing him in, we're taking Millwall forward."
Meanwhile, chief executive Ambler has revealed that the Lions may have to keep paying the wages of fringe players they want to send out on loan to other clubs.
John Marquis has been the subject of an approach from Leyton Orient – but the O's can only afford £500-per-week of the striker's salary.
Ambler said: "We may have to let some of our players go out for four weeks for next to nothing so that they can keep fit and play games. There comes a point when we have to let them out rather than keep playing them in our U21s side."