Lewer will remain as manager at least until his contract runs out in the summer.
Lewer's reign has been hampered by financial problems with several star players quitting the club.
"It is, therefore, fitting that we are adding to Royce's substantial Derbyshire legacy with this plaque, " Mr Lewer said.
The Stutes advertised the position, stating Lewer was out of contract but welcome to re-apply for his old job.
Lewer is out of contract in the summer and the club have been in contact with former boss Steve Fallon.
"Within 30 seconds of his first training session he had dismissed Alan Lewer in one way or another, " he said.
The plaque will be unveiled by Derbyshire County Council leader Andrew Lewer at Royce's former residence Quarndon House on 5 November.
Following discussions on Sunday, Fallon was reinstated, but Roach claims he broke the terms of their new agreement by confronting Lewer.
Lewer led the Stutes to safety in the Blue Square Premier this season after taking over from previous boss Steve Fallon.
Lewer was recruited to take over from him on a non-contract basis.
Lewer initially arrived at Histon in October 2009 as assistant to Fallon.
With Hollins departed, Alan Lewer will now get the opportunity to prove his worth in charge of the Terras in a caretaker capacity.
Fallon admits he was frustrated by Lewer's lack of support during his time away from the club, but denies threatening to sack him.
Roach claims disagreements over Lewer and his role at the club played a part in his departure and expects a change in management.
Former U's assistant-manager Alan Lewer and Ebbsfleet boss Liam Daish are believed to have been the two other leading contenders for the U's job.
Roach has grown increasingly close to Lewer during Fallon's suspension and says it became obvious he had to make a choice between Lewer and Fallon.
Mr Lewer said Royce, who was chosen in a public vote, was "someone who had contributed so much to the fame and fortune of the county".
Lewer has won just three of 22 league matches since succeeding Steve Fallon in December, but has seen his budget slashed with several key players leaving.
"Alan Lewer has been a real credit throughout this difficult time and he will now assume the responsibility of first team manager on a caretaker basis", added Curtis.
Lewer, who was interim boss in Fallon's absence and is in charge again, confirmed the pair had spoken on Monday and says Fallon was upset with his behaviour.
The former leader of the council, Tory Andrew Lewer managed to hold on to his seat but Lib Dem group leader Stephen Flitter was one of the higher profile casualties of the day.
Attempting to establish Crawley as a Conference force seems a long way removed but with Alan Lewer, who has worked at a clutch of Conference clubs, alongside him, Hollins is fuelled with belief.
BBC: SPORT | Football | My Club | Crawley Town | Hollins relishes new Crawley test
Beck, who was named as the successor to former boss Alan Lewer on Thursday, has signed a two-year deal at the club and will be tasked with helping the Stutes to avoid relegation.
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