NEW signing Paul Johnson may not be the last international to be added to Wolves' squad for 2007.

Paul Cullen has expressed his delight after securing Johnson's signature and has outlined the importance of having proven internationals in his side.

He has already snapped up Johnson's Lions teammate Adrian Morley this summer and, with spaces in next year's squad still available, the Wolves chief is hopeful that more internationals could be on the way.

"We'd like to think so," he said.

Cullen is closely guarding the identity of his targets but has given a hint that they may be players capped by Great Britain.

"We have a number of players that are out of contract and a number of other players that we are looking to try to bring in, so 2007 is not done and dusted regarding the shape of the team, or the personnel to apply that shape," he said.

"But the more Great Britain players you have in your side, the more options you have."

He added: "We're delighted to have captured Paul Johnson, who is another international player with a proven winning record in semi finals and Grand Finals.

"It's very important that we have players of that calibre and experience to assist our goal of getting up to the next level.

"His experience of getting to big games and winning them is something that we are a little short of."

And, while Cullen believes a lack of big game experience could be hampering his side's chances of winning that elusive trophy, he also thinks many of his current players will struggle to gain international recognition if Wolves cannot make more progress in the play-offs and the Challenge Cup.

Although he will again captain Wales in two friendlies this autumn, Lee Briers has yet to receive the Great Britain call-up many feel he deserves and only three players - Martin Gleeson, Paul Wood and Stuart Reardon - are in the Lions squad.

Cullen has named Chris Bridge, Mark Gleeson and Ben Westwood in his first squad as England coach but he believes some of his Wolves players - including Briers - would have a better chance of being selected if they enjoyed more success at club level.

He said: "When we are looking at trying to promote our players to international level, a constant negative is that we have not got enough players who win us semi finals and get us to finals.

"When it comes to international discussions on players, that's why the selection - whether it is England or Great Britain - is full of players from St Helens, Bradford, Leeds and now Hull.

"Their players get them through the season and they always have enough left to win semi finals and finals.

"That's something that no club can have enough of."

But although keen to bolster the squad with top players, Cullen is adamant that, despite a reputation for big spending in recent times, Wolves will not risk breaking Super League rules.

Both Wigan and Bradford have suffered points deductions recently after exceeding the salary cap, while clubs will also be limited to having 20 players on wages of £25,000 or more next year.

Cullen said: "The bottom line is that Warrington will not breach the salary cap or the 20/25. We are very mindful that we deliver that to our supporters, our sponsors and our backers."